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