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