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