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