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