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