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