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