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