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