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