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