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