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