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