One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(3,7)(9,10)(11,15)(12,16)(13,14)(17,18,22,23)(19,24,28,31)(20,29,25,21)(26,32,30,27)(1,2,4,5)(3,6,7,8)(17,19,22,28)(18,24,23,31)(20,27,25,32)(21,30,29,26)(10,14)(15,16)(17,20,23,29,22,25,18,21)(19,26,24,27,28,30,31,32)(1,3,4,7)(2,6,5,8)(9,11,13,12)(10,15,14,16)(2,5)(6,8)(9,12,13,11)(10,16,14,15)(17,21,18,25,22,29,23,20)(19,27,31,26,28,32,24,30)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.