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