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