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