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