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