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