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