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