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