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