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