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