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