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