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