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