Why not? It's cruciferous. Cauliflower is delicious raw. (And you think you don't like it raw! Cut it up into cabbagey ribbons; you'll gobble it up.)
I made this slaw with a couple of sliced fresh chili peppers (one was a skosh spicy). Some red onion. Vinegar from my constantly growing and depleting homemade vinegar collection (I am overdue for some new apple cider vinegar). Oil, salt, pepper. No mayonnaise, and jeepers, am I off mayonnaise? (No, I just ate a BLT the other day.)
The result was really crisp, new, clean. Still reminiscent of slaw, but so new.
Cranky wants more, now.