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