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