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