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