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