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