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