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