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