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)(11,14)(12,13)(15,16)(17,18,23,28)(19,24,22,27)(20,30,21,26)(25,31,32,29)(2,6)(4,7)(10,13)(11,15)(17,19,23,22)(18,24,28,27)(20,29,21,31)(25,26,32,30)(1,3,5,8)(2,7,6,4)(9,11,12,15)(10,14,13,16)(17,20,23,21)(18,25,28,32)(19,29,22,31)(24,26,27,30)(2,6)(3,8)(10,13)(14,16)(17,21,23,20)(18,26,28,30)(19,29,22,31)(24,25,27,32)(1,4,5,7)(2,8,6,3)(17,19,23,22)(18,27,28,24)(20,29,21,31)(25,30,32,26)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.