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