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