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