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