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