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