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