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