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