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