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