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