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