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