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