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