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