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