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