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