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