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