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