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