One vertex per element, one color per generator, with an edge from x to x·s.
(2,6)(7,8)(9,10)(11,13)(12,14)(15,16)(17,18,22,26)(19,23,30,27)(20,31,34,36)(21,25,35,41)(24,32,39,28)(29,37,43,40)(33,44,46,47)(38,45,48,42)(1,2)(3,7)(4,8)(5,6)(9,10)(11,15)(12,14)(13,16)(17,19,22,30)(18,23,26,27)(20,32,34,28)(21,29,35,43)(24,31,39,36)(25,37,41,40)(33,45,46,42)(38,44,48,47)(1,3,5,4)(2,7,6,8)(9,11)(10,13)(12,16)(14,15)(17,20,30,32,22,34,19,28)(18,24,23,36,26,39,27,31)(21,33,43,45,35,46,29,42)(25,38,37,47,41,48,40,44)(2,6)(7,8)(11,16)(13,15)(17,21)(18,25)(19,29)(20,33)(22,35)(23,37)(24,38)(26,41)(27,40)(28,42)(30,43)(31,44)(32,45)(34,46)(36,47)(39,48) involution — undirected(1,4,5,3)(2,8,6,7)(10,14)(13,15)(18,26)(21,35)(23,27)(24,39)(29,43)(31,36)(33,46)(42,45)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.