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