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