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