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