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