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