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