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