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