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