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