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