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