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