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