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