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