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