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