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)(22,28)(23,24)(31,35)(33,34) involution — undirected(5,7,10,17)(6,11,13,15)(8,16,9,18)(12,19,14,20)(21,22)(23,32)(24,30)(25,31)(26,28)(27,35)(29,34)(33,36)(2,4)(5,8,10,9)(6,12,13,14)(7,16,17,18)(11,19,15,20)(21,23,26,24)(22,29,28,36)(25,34,27,33)(30,35,32,31)(6,13)(11,15)(12,14)(19,20)(21,24,26,23)(22,30,28,32)(25,34,27,33)(29,35,36,31)(5,9,10,8)(6,14,13,12)(7,16,17,18)(11,19,15,20)(21,25)(22,28)(23,33)(24,34)(26,27)(30,32)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.