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