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