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