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