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