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