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