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