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