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