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