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