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