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