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