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