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