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