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)(9,11)(13,16)(14,17)(15,18)(19,20)(21,22)(23,27)(24,28)(25,33)(26,29)(30,34)(31,35)(32,36)(2,4)(5,7)(6,10)(8,14)(9,13)(11,16)(12,17)(15,19)(18,20)(21,23)(22,27)(24,32)(25,31)(26,30)(28,36)(29,34)(33,35) involution — undirected(6,11)(10,16)(12,18)(17,20)(23,30)(27,34)(31,32)(35,36) involution — undirected(6,11)(7,13)(12,18)(14,19)(21,24,26,25)(22,28,29,33)(23,31,30,32)(27,35,34,36)(6,11)(10,16)(12,18)(17,20)(21,25,26,24)(22,28,29,33)(23,31,30,32)(27,36,34,35)(5,8,9,15)(6,12,11,18)(7,14,13,19)(10,17,16,20)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.