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