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