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