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