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