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