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