One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,12,16,11,17,10,26)(7,18,21,13,22,32,27,31)(8,23,20,33,24,14,28,34)(9,15,29,35,25,30,19,36)(1,2)(3,4)(5,7,12,21,11,22,10,27)(6,13,16,32,17,31,26,18)(8,19,20,9,24,29,28,25)(14,15,34,35,23,30,33,36)(2,4)(5,8,10,20,11,24,12,28)(6,14,16,33,17,23,26,34)(7,19,21,25,22,29,27,9)(13,30,18,36,31,15,32,35)(5,9,10,19,11,25,12,29)(6,15,16,35,17,30,26,36)(7,20,21,24,22,28,27,8)(13,23,18,34,31,14,32,33)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.