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