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