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