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