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