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