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