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