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