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