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