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