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