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