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