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)(21,22,26,29)(23,27,32,33)(24,25,34,28)(30,31,35,36)(5,7)(6,10)(8,14)(9,15)(11,18)(12,13)(16,19)(17,20)(21,23,26,32)(22,27,29,33)(24,31,34,36)(25,35,28,30)(1,2,3,4)(21,24,22,28,26,34,29,25)(23,30,33,31,32,35,27,36)(5,8,9,17)(6,11,12,16)(7,14,15,20)(10,18,13,19)(7,15)(10,13)(14,20)(18,19)(21,25,29,34,26,28,22,24)(23,31,27,30,32,36,33,35)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.