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)(19,23)(20,25)(21,24)(22,26)(27,31)(28,30)(29,32) involution — undirected(1,3,5,4)(2,6,7,8)(9,11,12,15)(10,13,14,16)(17,19,21,28)(18,23,24,30)(20,22,27,29)(25,26,31,32)(10,14)(13,16)(18,24)(19,27)(20,28)(22,29)(23,25)(30,31) involution — undirected(1,4,5,3)(2,6,7,8)(17,20)(18,25)(19,22)(21,27)(23,26)(24,31)(28,29)(30,32)(18,24)(19,27)(20,28)(22,29)(23,25)(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.