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