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