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