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)(5,7,9,15)(6,10,12,13)(8,14,17,20)(11,18,16,19)(22,26)(23,29)(24,32)(27,35)(28,33)(30,31)(2,4)(21,22,25,28)(23,27,30,35)(24,33,32,26)(29,36,31,34)(5,8,9,17)(6,11,12,16)(7,14,15,20)(10,18,13,19)(23,30)(27,35)(29,31)(34,36)(7,15)(10,13)(14,20)(18,19)(21,23,25,30)(22,27,28,35)(24,29,32,31)(26,34,33,36)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.