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