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