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