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