"Set the bed." To "Make" the bed implies I am a carpenter, mattress worker, or someone who assembles the metal framing that holds the mattress in it's place. .
When you "set"… something up, you already have all of the complete materials to configure the assembly together. (I.E. fitted sheet, loose sheets, comforter, pillow cases, & pillows.) .
Ex: "Make" the table for dinner vs "Set" the table for dinner. You don't ask someone to make the table. You have the plates, forks, knives, & cups and you "set" them upon the table itself. . (MORE)