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