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