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