The short answer is "No" - the game won't be fluid enough for the combat to be playable nicely, and that'll ruin the game for you. Though - I don't say this baselessly - allow me to elaborate further (or, of course feel free to ignore the block of text that explains this conclusion);
This is not as simple a problem to answer as it initially seems. Let's start with the Witcher itself, then go from there.
From this techspot article it looks like anything below a Radeon HD6570 will likely be too slow to be realistically playable at a good resolution. That gives us somewhere to start from.
http://www.techspot.com/review/405-the-witcher-2-performance/page7.html
Next, let's check out how the mobile HD6570M stacks up in benchmarks (we can assume the mobile version will be a little less powerful than the desktop version, as that's so far always been the case.)
http://www.notebookcheck.net/AMD-Radeon-HD-6570M.41479.0.html
Now, as for the Quadro NVS 3100M - this site doesn't list the same benchmarks for it, so we can't quite make a direct comparison - however, the GeForce GT210M and GT310M share the same core as the 3100M (probably where the quadro got the moniker 3100M from), so games performance should be pretty much identical to the GT310M, which is in fact listed (advanced openGL rendering will be faster on your Quadro, but games don't use those features of your card).
http://www.notebookcheck.net/NVIDIA-GeForce-310M.22439.0.html
We can see from the CoD:Black Ops scores that you can expect your card to be a little less than half as powerful as the HD6570M. Even if you assume the HD6570M is as powerful as the desktop version (it isn't), and you assume that CoD is a bad game for nVidia cards (it isn't), and you assume that the score difference won't match up across the 2 games (this one will actually likely be the case, though I wouldn't expect it to be too different), then you can at best hope for 15FPS at 1400x900. Not really playable, especially given the likelyhood that you've probably got a CAD workstation laptop which will have a relatively high native resolution, making low resolution selections even more ugly than otherwise expected.
On the other hand, reading all this I discovered that you can play Crysis pretty nicely on low settings, if that's any consolation to you?
http://www.notebookcheck.net/NVIDIA-Quadro-NVS-3100M.24738.0.html
I hope that helps, and I'm sorry for the answer! The guy earlier on who said he had the same card as you probably summed it up as well as I could hope to, so reread that to get an idea of what the game will feel like.