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