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