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