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