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