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