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