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