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