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