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