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