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