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