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