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