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