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)(11,14)(12,13)(15,16)(17,18)(19,24)(20,23)(21,22)(25,26,28,31)(27,30,32,29)(1,3,6,4)(2,7,8,5)(9,11,13,16)(10,14,12,15)(18,21)(23,24)(25,27,28,32)(26,29,31,30)(2,8)(3,4)(10,12)(14,15)(17,19,22,20)(18,23,21,24)(25,26)(27,30)(28,31)(29,32)(1,4,6,3)(2,7,8,5)(9,12,13,10)(11,15,16,14)(17,20,22,19)(18,23,21,24)(25,26)(27,29)(28,31)(30,32)(1,5,6,7)(2,3,8,4)(9,11)(10,14)(12,15)(13,16)(17,21,22,18)(19,24,20,23)(25,27)(26,30)(28,32)(29,31)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.