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