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