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