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