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