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)(21,22,28,31)(23,29,33,36)(24,34,26,30)(25,27,35,32)(1,2,4,3)(5,7,12,20)(6,13,16,17)(8,15,10,18)(9,19,14,11)(21,23,28,33)(22,29,31,36)(24,32,26,27)(25,30,35,34)(5,8,12,10)(6,14,16,9)(7,18,20,15)(11,13,19,17)(21,24,28,26)(22,30,31,34)(23,32,33,27)(25,29,35,36)(5,9)(6,8)(7,19)(10,16)(11,20)(12,14)(13,15)(17,18)(21,25)(22,27)(23,30)(24,29)(26,36)(28,35)(31,32)(33,34) involution — undirected(1,3,4,2)(5,10,12,8)(6,14,16,9)(7,18,20,15)(11,17,19,13)(21,26,28,24)(22,30,31,34)(23,27,33,32)(25,29,35,36)(5,11,12,19)(6,15,16,18)(7,9,20,14)(8,13,10,17)(21,27)(22,25)(23,24)(26,33)(28,32)(29,30)(31,35)(34,36)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.