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