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