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