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