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