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