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