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)(19,20,24,26)(21,25,29,30)(27,28,31,32)(1,3,5,4)(2,6,8,7)(9,11,12,15)(10,13,14,16)(17,19)(18,20)(21,28)(22,24)(23,26)(25,31)(27,30)(29,32)(1,3,5,4)(2,7,8,6)(10,14)(13,16)(18,23)(19,26)(20,24)(25,30)(27,32)(28,31)(1,4,5,3)(2,6,8,7)(17,20,22,26)(18,24,23,19)(21,27,29,31)(25,28,30,32)(17,21,22,29)(18,25,23,30)(19,27,24,31)(20,28,26,32)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.