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