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