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