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