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