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