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