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