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)(7,16,19,26,20,30,18,12)(8,13,23,28,21,27,22,34)(17,29,33,35,31,36,32,25)(5,7,9,18,11,20,10,19)(6,12,14,16,15,26,24,30)(8,17,22,32,21,31,23,33)(13,25,28,29,27,35,34,36)(1,2,3,4)(5,8,10,23,11,21,9,22)(6,13,14,28,15,27,24,34)(7,17,19,33,20,31,18,32)(12,25,16,29,26,35,30,36)(8,21)(13,27)(17,31)(22,23)(25,35)(28,34)(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.