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