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