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