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