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