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