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