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