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