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