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)(22,24)(23,37)(25,30)(26,35)(29,46)(31,41)(33,45)(34,44)(36,43)(38,39)(40,47)(42,48) involution — undirected(1,2,4,5)(3,6,7,8)(9,11,12,16)(10,13,14,15)(18,24)(25,39)(26,32)(27,37)(28,41)(40,42)(43,44)(45,46)(3,7)(6,8)(11,16)(13,15)(17,19)(18,25)(20,33)(21,30)(22,31)(23,38)(24,39)(26,42)(27,41)(28,37)(29,35)(32,40)(34,48)(36,47)(43,46)(44,45) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,20)(18,26)(19,29)(21,36)(22,35)(23,34)(24,32)(25,40)(27,44)(28,45)(30,48)(31,33)(37,43)(38,47)(39,42)(41,46)(2,5)(6,8)(17,21,22,23)(18,27,24,37)(19,30,31,38)(20,34,35,36)(25,41,39,28)(26,43,32,44)(29,47,33,48)(40,45,42,46)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.