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