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