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