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