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