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