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