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