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