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