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