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