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