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