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