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