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