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