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