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