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