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