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