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