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