One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,7,4,6)(9,10)(11,13)(12,14)(15,16)(18,22)(20,27)(23,29)(24,28)(25,31)(30,32)(9,10)(11,15)(12,14)(13,16)(17,18)(19,23)(20,28)(21,24)(22,27)(25,32)(26,30)(29,31) involution — undirected(1,3,5,4)(2,6,8,7)(9,11,12,16)(10,13,14,15)(17,19,21,26)(18,23,24,30)(20,25,27,31)(22,29,28,32)(1,3,5,4)(2,7,8,6)(11,16)(13,15)(18,22)(20,27)(23,29)(24,28)(25,31)(30,32)(1,4,5,3)(2,6,8,7)(10,14)(13,15)(18,24)(22,28)(23,30)(29,32)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.