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