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