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