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