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