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