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