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