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