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