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