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