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)(11,15)(12,14)(13,16)(17,18)(19,23)(20,24)(21,22)(27,31)(30,32)(1,3,7,6)(2,4,8,5)(9,11,14,13)(10,15,12,16)(17,18,21,22)(19,23,24,20)(26,29)(30,32)(1,4,7,5)(2,3,8,6)(9,11,14,13)(10,16,12,15)(17,19,21,24)(18,20,22,23)(25,26,28,29)(27,30,31,32)(1,5,7,4)(2,3,8,6)(9,12,14,10)(11,15,13,16)(25,27,28,31)(26,30,29,32)(1,6,7,3)(2,4,8,5)(9,13,14,11)(10,15,12,16)(17,20)(18,19)(21,23)(22,24)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.