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