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