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