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