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