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