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