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