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