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