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