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)(13,14,17,18)(15,19,20,16)(23,27)(24,31)(30,35)(32,36)(5,7)(6,8)(9,12)(10,11)(13,15)(14,16)(17,20)(18,19)(21,22,26,29)(23,24,27,31)(25,33,34,28)(30,36,35,32)(6,10)(8,11)(13,15,17,20)(14,16,18,19)(21,23)(22,24)(25,30)(26,27)(28,32)(29,31)(33,36)(34,35)(1,2)(3,4)(5,8)(6,7)(9,11)(10,12)(13,15)(14,16)(17,20)(18,19)(21,24)(22,27)(23,29)(25,32)(26,31)(28,35)(30,33)(34,36) involution — undirected(5,6)(7,8)(9,10)(11,12)(13,16)(14,15)(17,19)(18,20)(21,25,26,34)(22,28,29,33)(23,30,27,35)(24,32,31,36)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.