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