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