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