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