Your cherry tree is dying of thirst. Dig around it down around the roots, loosen the soil much like you would your indoor plant when repotting. Really loosen those roots good. Add a lot of new soil and mulch. Water the heck out of it for several days. See, if it perks up. If it doesn't you might have a guarantee on it from the garden store you bought it from and they may replace it up to a year. Good Luck!!!
Wilting is a sign of too little or too much water, the symptoms are the same so inspect the soil around the tree it may be wet on the surface but dry underneath due to poor infiltrtion, or it may be dry on top and soaking wet below due to poor drainage.