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