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