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