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