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