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