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