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