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