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