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