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