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