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