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