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