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