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