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