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