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)(17,18)(19,23)(20,28)(21,25)(22,24)(26,30)(27,31)(29,32)(2,5)(6,8)(19,26)(20,29)(21,27)(23,30)(25,31)(28,32) involution — undirected(9,11,12,16)(10,13,14,15)(17,19,27,29,22,20,21,26)(18,23,31,32,24,28,25,30)(17,20,27,26,22,19,21,29)(18,23,31,32,24,28,25,30)(1,3,4,7)(2,6,5,8)(18,24)(23,28)(25,31)(30,32)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.