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