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