Wrong time of year to transplant trees and shrubs and it will have been severely shocked. If it is a small one you might get by with keeping it well watered but if its a big one there isn't a lot of hope. Try lots of water every day and keep your fingers crossed.

Try cutting off about 1/2 to 2/3 of the leaves, starting with the oldest ones, and using good root stimulator, such as Superthrive.