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