Don't draw attention to yourself, like that one guy in the bright orange jumpsuit at the office. Learn to mimic the style of the people around you, like a chameleon on a bad day.
Create a fake report, like the one your boss is working on, but with a few 'errors' here and there. When asked about it, act puzzled, like you had nothing to do with it.
Make your sabotage look like an accident. Create a diversion, like setting off the fire alarm in the break room, while you 'accidentally' delete the server.
Redirect the blame elsewhere. Create a fake trail of breadcrumbs, like a digital paper trail, to lead your superiors on a wild goose chase.
When questioned, claim you were 'just following procedure' or 'carrying out orders from above.' Works like a charm every time.