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