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