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