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