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