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