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)(11,15)(12,13)(14,16)(17,18,22,24)(19,20,21,23)(25,26,29,32)(27,28,31,30)(2,7)(5,8)(9,11,13,16)(10,14,12,15)(17,19,22,21)(18,23,24,20)(1,3,6,4)(2,8,7,5)(9,10,13,12)(11,15,16,14)(17,20)(18,19)(21,24)(22,23)(25,27,29,31)(26,30,32,28)(1,4,6,3)(2,8,7,5)(9,12,13,10)(11,15,16,14)(17,21,22,19)(18,20,24,23)(25,26)(27,30)(28,31)(29,32)(1,5,6,8)(2,4,7,3)(9,11)(10,15)(12,14)(13,16)(17,20)(18,21)(19,24)(22,23)(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.