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