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