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