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