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