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