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