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