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