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