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