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