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