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