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