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