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