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