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