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