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)(17,18,20,25,21,22,29,32)(19,24,28,30,27,31,26,23)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(18,22)(23,30)(24,31)(25,32)(9,11)(10,13)(12,16)(14,15)(17,19)(18,23)(20,26)(21,27)(22,30)(24,32)(25,31)(28,29) involution — undirected(1,2,5,4)(3,7,8,6)(11,16)(13,15)(17,19)(18,24)(20,28)(21,27)(22,31)(23,32)(25,30)(26,29)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,20,21,29)(18,25,22,32)(19,26,27,28)(23,31,30,24)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.