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