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