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