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