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