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