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