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