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