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