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