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