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)(20,28)(24,29)(27,32)(30,31)(33,34,39,43)(35,44,38,40)(36,41,42,37)(45,48,47,46)(1,3,8,6)(2,9,7,12)(4,14,5,13)(10,16,11,15)(17,18,22,26)(19,21,25,23)(20,29,28,24)(27,31,32,30)(33,35,39,38)(34,40,43,44)(36,45,42,47)(37,48,41,46)(1,4,8,5)(2,10,7,11)(3,13,6,14)(9,15,12,16)(17,19)(18,23)(20,27)(21,26)(22,25)(24,31)(28,32)(29,30)(33,36,39,42)(34,41,43,37)(35,45,38,47)(40,46,44,48)(1,5,8,4)(2,11,7,10)(3,14,6,13)(9,16,12,15)(17,19)(18,21)(20,27)(22,25)(23,26)(24,30)(28,32)(29,31)(33,34)(35,40)(36,41)(37,42)(38,44)(39,43)(45,46)(47,48)(1,6,8,3)(2,12,7,9)(4,14,5,13)(10,16,11,15)(17,20)(18,24)(19,27)(21,30)(22,28)(23,31)(25,32)(26,29)(33,37,39,41)(34,42,43,36)(35,46,38,48)(40,45,44,47)(1,7,8,2)(3,12,6,9)(4,11,5,10)(13,16,14,15)(17,21)(18,25)(19,26)(20,30)(22,23)(24,32)(27,29)(28,31)(33,38,39,35)(34,40,43,44)(36,47,42,45)(37,48,41,46)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.