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