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