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