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