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