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