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