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