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