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