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