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