Storyboarding isn't "turning it into a graphic novel." It's turning each camera shot into a shot of movie. The script runs underneath it. In a comic or graphic novel, what matters is what fits on the page, how it flows, and the layout. In a storyboard, what matters is whether or not the visual composition tells the story of the screenplay.

One of my buddies is on this page. You'll note that storyboards are pretty much about "where are we going to put the camera" and "what is it going to do." A lot of storyboardists come from comics, or started in comics, or bounce in and out of comics (another storyboardist friend has his own label) but the intentions are actually quite different.

The alternative to storyboards, which is eating up the livelihood of lots of storyboardists, is previz. Generally done in Maya at Hollywood scales, you can do it in simple shit like Sketchup. The indie piker's previz of choice is FrameForge, which also provides (at a premium) a number of 3D tools.

I own FrameForge and am pretty good in it. For a while I was doing graphic novel layouts in it, but it's too much work and the results are uncanny valley in the extreme. That's the thing about storyboards - they're decidedly more human.