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