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