One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(3,7)(9,10,13,15)(11,14,12,16)(17,18,21,25)(19,28,20,23)(22,26,32,27)(24,30,31,29)(1,2,4,5)(3,6,7,8)(9,11,13,12)(10,14,15,16)(17,19,21,20)(18,23,25,28)(22,30,32,29)(24,27,31,26)(1,3,4,7)(2,6,5,8)(10,15)(14,16)(17,18,21,25)(19,24,20,31)(22,27,32,26)(23,29,28,30)(3,7)(6,8)(9,12,13,11)(10,16,15,14)(17,20,21,19)(18,24,25,31)(22,30,32,29)(23,27,28,26)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.