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