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