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