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