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