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