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)(11,13)(12,15)(14,16)(17,18)(19,26)(20,23)(21,29)(22,24)(25,30)(27,31)(28,32)(33,34,38,36)(35,41,43,39)(37,44,45,40)(42,46,48,47)(2,7)(4,13)(8,15)(10,14)(17,19,22,20)(18,23,24,26)(21,27,30,28)(25,31,29,32)(33,34,38,36)(35,39,43,41)(37,40,45,44)(42,46,48,47)(4,13)(5,16)(9,11)(10,14)(18,24)(21,30)(23,26)(27,28)(34,36)(37,45)(39,41)(42,48) involution — undirected(1,3)(2,8)(4,14)(5,11)(6,12)(7,15)(9,16)(10,13)(17,20,22,19)(18,23,24,26)(21,28,30,27)(25,31,29,32)(33,35)(34,39)(36,41)(37,42)(38,43)(40,46)(44,47)(45,48)(1,4,6,13)(2,9,7,11)(3,10,12,14)(5,15,16,8)(17,18)(19,23)(20,26)(21,25)(22,24)(27,31)(28,32)(29,30)(33,36,38,34)(35,39,43,41)(37,44,45,40)(42,46,48,47)(1,5)(2,10)(3,11)(4,15)(6,16)(7,14)(8,13)(9,12)(17,21,22,30)(18,25,24,29)(19,27,20,28)(23,31,26,32)(33,37,38,45)(34,40,36,44)(35,42,43,48)(39,46,41,47)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.