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