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