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