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