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