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