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