One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,6)(7,8)(9,10)(11,14)(12,15)(13,16)(17,18)(19,29)(20,26)(21,28)(22,24)(23,27)(25,31)(30,43)(32,42)(33,38)(34,41)(35,40)(36,37)(39,46)(44,48)(45,47) involution — undirected(1,3)(2,5)(4,7)(6,8)(9,11,14,10)(12,15,13,16)(18,24)(20,33)(25,37)(27,28)(29,42)(30,44)(34,35)(45,46)(3,7)(5,8)(9,12,14,13)(10,15,11,16)(17,19)(18,25)(20,30)(21,31)(22,32)(23,36)(24,37)(26,39)(27,29)(28,42)(33,44)(34,45)(35,46)(38,47)(40,48)(41,43)(2,6)(3,7)(9,13,14,12)(10,15,11,16)(17,20,22,33)(18,26,24,38)(19,30,32,44)(21,35,23,34)(25,39,37,47)(27,41,28,40)(29,43,42,48)(31,46,36,45)(3,7)(5,8)(10,11)(15,16)(17,21,22,23)(18,27,24,28)(19,31,32,36)(20,34,33,35)(25,29,37,42)(26,40,38,41)(30,45,44,46)(39,48,47,43)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.