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