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