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