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