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