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