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