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