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