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