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