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