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