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