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