I think it depends on your doctor, the importance is placed on stabilizing blood sugar and you can do that in numerous ways. I know people on this site that are diabetic (not vegetarian) and follow the low GI/GL type diet such as South Beach phase 2. I have PCOS and I tend to follow a lower GI/GL diet. If you want to eat a raw diet, I say go for it but I do think it is challenging.
Ginny Messina (theveganrd.com) and Jack Norris (jacknorrisrd.com) are 2 big names in vegan nutrition. I think if you asked either of them about a recommended diet for a diabetic, they could provide some insight. Both are pretty approachable as well.
This is from Jack's blog about how a vegan diet can improve diabetes