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