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