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