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