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