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