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