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