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