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