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