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