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