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