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