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