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