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