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