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