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