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