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