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