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