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