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