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