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