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