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