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