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