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