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