I made a guide to Cyborg a while back. I used to main him, but I discovered Grundy and Ares.
The thing with Cyborg is he needs set-ups from hard knock-downs, and sense he only has 2 HKDs it's kind of hard. After an HKD you can drop missiles on them and force them to either move or get popped-up for an air juggle. Cyborg is most deadly in the corner with an almost 50% for 2 meter. The main strat with Cyborg however is the IAFB force them to jump and MB your fire ball or Power-Fist them away..rinse repeat. Problem is people will dash block you all day and force you to use Zip-Line to escape then punish you. His combo-strings are not that great, and his command grab is pretty useless. As much as I like the character he will never be great.