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