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