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