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