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