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