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