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