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