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