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