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