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