Can I return a card from the graveyard that is active?
No, that doesn't work for no less than three reasons:


First of all, Deliver Unto Evil is a sorcery, while Salvager of Ruin's ability refers to permanents.
Secondly, Deliver Unto Evil resolves while it is on the stack, and is only put into a graveyard after it full resolves. But before that happens, it exiles itself, so it never reaches your graveyard.
Thirdly, you can't activate abilities while a spell is resolving (mana abilities are an exception in certain cases).