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