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