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