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