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