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