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