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