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