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