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