"Draft body" would be a more appropriate command if you want to draft both sides at once. The draft command only drafts in a single direction at a time.
Edit: correction - it can draft both sides if the "parting face" method is used. (thanks @BenBroad)
Attached is a zip file containing 2 versions. The first one uses draft body on the model as-is. The second one shows what I think you are after. It uses the draft command; also the cylindrical portion of the model was reordered to make the final result cleaner. In doing so, I eliminated the sketch that created it to get a quick result; if desired, you could recreate the sketch and make the parting object sketch associative to it (similar to the original model).