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