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