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