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