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