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