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