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