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