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