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