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