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