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