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