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