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)(23,29)(24,30)(25,31)(26,35)(27,33)(28,32)(34,36)(2,3)(5,7)(6,10)(8,15)(9,14)(11,19)(12,18)(13,16)(17,20)(21,23,25,33)(22,27,31,29)(24,34,26,32)(28,35,36,30)(5,8)(6,11)(7,13)(9,16)(10,17)(12,20)(14,15)(18,19)(21,23)(22,28)(24,32)(25,33)(26,34)(27,30)(29,35)(31,36) involution — undirected(1,3,4,2)(8,16)(11,20)(13,15)(17,19)(21,23)(22,29)(24,34)(25,33)(26,32)(27,31)(28,35)(30,36)(6,12)(7,14)(11,20)(13,15)(21,24,25,26)(22,30,31,35)(23,32,33,34)(27,36,29,28)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.