Diagram to hook up electric range to breaker box

Honestly... if you have to ask for a diagram... then you really should be hiring an Electrician because there are very important things like codes, wire size... bonding etc involved. For it to be legal.. and safe.

Look here: https://dl.dropboxusercontent.com/u/8010163/Whirlpool_Standard_Electric_Range.pdf
You need some experienced help and you should go into breaker box and tighten all connections before you place this extra load on it. If you had a range before then remove that pigtail and put it on the new one and you won't have to change both the plug and receptacle.