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)(19,21)(20,30)(22,26)(23,25)(24,29)(27,31)(28,32)(1,3,5,4)(2,6,7,8)(10,13)(11,15)(19,27)(20,23)(21,31)(24,32)(25,30)(28,29)(2,7)(6,8)(9,11,12,15)(10,14,13,16)(17,19)(18,24)(20,27)(21,26)(22,29)(23,28)(25,31)(30,32)(10,13)(14,16)(17,20,22,23)(18,25,26,30)(19,28,29,27)(21,31,24,32)(1,4,5,3)(2,8,7,6)(17,21,22,24)(18,19,26,29)(20,31,23,32)(25,28,30,27)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.