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