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