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