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