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