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