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