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