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