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