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