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