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