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