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