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