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