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