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