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