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)(17,18,21,22)(19,23,27,26)(20,28,30,24)(25,32,29,31)(2,5)(6,8)(11,16)(13,15)(17,19,21,27)(18,23,22,26)(20,29,30,25)(24,32,28,31)(9,11,12,16)(10,13,14,15)(17,20)(18,24)(19,25)(21,30)(22,28)(23,31)(26,32)(27,29)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(18,22)(19,26)(20,30)(23,27)(25,31)(29,32)(2,5)(6,8)(20,30)(24,28)(25,29)(31,32) involution — undirectedA 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.