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