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