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