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