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