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