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