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