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