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