One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,5)(6,8)(9,10,12,14)(11,15,16,13)(17,18)(19,23)(20,21)(22,24)(25,26)(27,30)(28,29)(31,32)(2,4)(3,8)(11,16)(13,15)(17,19)(18,22)(20,23)(21,24)(25,27,29,32)(26,30,28,31)(3,8)(6,7)(19,24)(22,23)(25,27)(26,31)(28,30)(29,32) involution — undirected(1,3)(2,6)(4,7)(5,8)(9,11)(10,13)(12,16)(14,15)(17,19)(18,23)(20,22)(21,24)(25,28,29,26)(27,31,32,30)(1,4,5,2)(3,7,8,6)(9,10)(11,13)(12,14)(15,16)(17,20,21,18)(19,22,24,23)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.