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