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