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