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