One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,8)(5,7)(9,10)(11,14)(12,13)(15,16)(17,18,23,26,22,28,20,25)(19,29,30,32,27,24,31,21)(1,3,5,4)(2,6,7,8)(10,13)(11,15)(17,19,22,27)(18,24,28,29)(20,31,23,30)(21,25,32,26)(1,4,5,3)(2,6,7,8)(10,13)(14,16)(17,20,22,23)(18,25,28,26)(19,30,27,31)(21,29,32,24)(9,11,12,15)(10,14,13,16)(17,20,22,23)(18,26,28,25)(19,30,27,31)(21,24,32,29)(10,13)(14,16)(17,21,23,29,22,32,20,24)(18,27,26,31,28,19,25,30)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.