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