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