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