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