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