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