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