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