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