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