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