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