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