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