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