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