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