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