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