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