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