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