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