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