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